<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Three 创建场景</title>
  <style>
    .three-show {
      width: 500px;
      height: 500px;
      border: 1px solid red;
    }
  </style>
</head>
<body>

  <div class="three-show"></div>

  <script src="../js/three.js"></script>
  <script>
    const oBox = document.getElementsByClassName('three-show')[0]
  </script>
</body>
</html>